Changing the Default PDF Version by ADS

I need to change the version of PDF generated with Adobe Forms. The PDF version of the ADS generated by default is "1.6 (Acrobat 7.x). " In preview PDF version is generated by ALCD "1.7, Adobe Extension Level 3 (Acrobat 9.x), and this is the version that I need, because version 1.6 lacks many things.

We have proven what does this link but does nothing, the pdf version are as 1.6 ...